mail.php headers utf-8

<?php

if(isset($_REQUEST['ajaxform']) && isset($_REQUEST['ajaxform']['m'])) {
	$data = $_REQUEST['ajaxform'];
	$message_type = $data['m'];

	$types = array(
		1 => array(
			'subject' => 'Обратный звонок',
			'to' => 'mail@mail.ru',
			),
		2 => array(
			'subject' => 'Обратный звонок',
			'to' => 'mail@mail.ru',
			),
		3 => array(
			'subject' => 'Обратный звонок',
			'to' => 'mail@mail.ru',
			),					
	);

	$labels = array(
		'name' => 'Имя',
		'phone' => 'Номер телефона',
		'docs' => 'Пакет документов',
		'email' => 'E-mail',
		'sum' => 'Первоначальный взнос',
		'complectation' => 'Комплектация',
		'insuarance' => 'КАСКО',
		'comment' => 'Комментарий',
	);

	if(isset($types[$message_type])) {

		unset($data['m']);

		$to = $types[$message_type]['to'];
		$subject = $types[$message_type]['subject'];

		$msg = '';
		foreach ($data as $var => $value) {
			if(isset($labels[$var]))
				$msg.=$labels[$var]." : ".$value."\r\n";
			else
				$msg.=$var." : ".$value."\r\n";
		}

		$headers   = array();
		$headers[] = "MIME-Version: 1.0";
		$headers[] = "Content-type: text/plain; charset=utf-8";
		$headers[] = "From: Solaris Promo <robot@mail.ru>";
		$headers[] = "Subject: {$subject}";
		$headers[] = "X-Mailer: PHP/".phpversion();

		if(mail($to, $subject, $msg, implode("\r\n", $headers)))
			echo 1;
		else echo 0;
	}
	else echo 0;
}
else echo 0;

?>